You might consider 'Caldwell Pink,' also on the Earthkind list. That was the most disease resistant rose I ever grew. I don't remember it ever having a leaf or two drop from Blackspot at any given time. It's only drawback is that is has NO scent whatsoever. Unfortunately, that's a big one for me, but you don't mention scent as one of your criteria. Seriously, though, if anyone would be interested in starting a rose breeding program for areas with high humidity, 'Caldwell Pink' would be a good place to start.

The Honolulu Rose Society lists these as good performers here-climate sounds close. OGRS, Shrubs Abraham Darby - Pink/Apricot Archduke Charles - Red Blend Blush Noisette - Light Pink/Lilac Boule de Neige - White Cecile Brunner - Light Pink Comte de Chambord - Pink Eugene de Beauharnais - Burgundy Evelyn - Pink/Apricot Fair Bianca - White Francis Dubreuil - Dark Red Giant of Battles - Deep Pink Gruss an Aachen - White/Pink Jacques Cartier - Light Pink Jude the Obscure - Apricot Louis Phillipe - Red Blend Monsieur Tillier - Orange Pink Old Blush - Medium Pink Pretty Jessica - Pink Prospero - Red/Burgundy Rose de Rescht - Dark Pink Sharifa Asma - Lt. Pink Sombreuil - White Souvenir de la Malmaison - Pink Tamora - Apricot The Fairy - Light Pink The Prince - Red/Purple They list climbers, floribunda, HTs, and miniatures as well. Here is a link that might be useful: Honolulu Rose Society

Update, 1 year later, temps in the upper 90's to 100's. Winchester Cathedral: kept growing and blooming when the heat began, but then slowed down and with much smaller flowers. Weird fragrance. Bolero: Second year. Grows and blooms throughout the heat, almost the same as in the cooler weather. Nice fragrance. Flowers are with rare exception damaged and distorted by thrips. Looks awful most of the time. William Shakespeare 2000: third year. Keeps putting out flowers if well irrigated, but flowers more pale and fry by day 2. Probably would be better if grown very wet, but not something I want to do here in the desert. Falstaff: puts out a few flowers and growth slows but does not stop in the heat. Flowers are smaller, but do not fade, and they do keep their petal count. No fragrance. Abraham Darby: Second year. Flowers withered immediately when touched by the high altitude sun here in 80 degrees, even with copious rain. Does not want to grow. May need more water. Plant is removed. Glamis Castle: New this year. After a troubling start (did not like being overwintered in the garage, was then planted out), flowers came in the heat of summer, lasted a few days without damage. Fragrance of mothballs. Radio Times: Produced a lot of flowers in its first flush that did not show damage in the heat, but as the heat wore on, no signs of growth on this second year plant. Great fragrance, color and form. Wish it would grow. Alnwick Rose: Second year. Continues to grow and put out flowers in the heat, but they don't last more than a day before getting crispy. No fading in that one day. Absolutely wonderful fragrance. Evelyn: just planted a month ago. Put out one flower in 90's heat, no heat damage. Bishop's Castle: New this year, grew slowly in the unusually cool spring, growth sped up in the heat. Keeps growing and putting out buds in temps over 100. Flowers bleach with temps greater than 100, and don't last as long but still a few days. Mild fragrance. So far the most vigorous in the heat. This is the best Austin in the heat in my garden this year. Incidentally: Madame Isaac Pereire and Marie Pavie, seem to be doing just fine in the heat, with irrigation. Thanks all, for your input!

St. Patrick, Marilyn Monroe (friend has), PJPII, Randy Scott, Voluptuous, Europeana, Let Freedom Ring, Veteran's Honor, Sexy Rexy, Rose' (color fades), Grande Amore, Donna Martin, Mohana, Welcome Home, Black Magic (smaller flatter blooms), Tahitian Sunset, Whirlaway, Tineke, European Touch, Rainbow Niagra ( blooms fried 1st 2 yrs., 3rd yr. lasting much better & longer), Falling In Love (opens fast in heat, but open bloom lasts) Scentimental fries in the heat...love the bloom in cooler temps; Beverly (1&2 yr. old plants) fries in the heat Snuffy nice bloom goes flat in heat Hot Princess fades and fewer petals Spellbound fades Next week temps suppose to be in low 90's. I should be able to update this info. Rain is another factor that affects how well the plant tolerates the heat. Thanks for starting this post!